EESB05H3 Chapter Notes - Chapter 1: Soil Horizon, Helminthiasis, Regolith

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19 Sep 2012
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Provide a medium for plant roots and supply nutrient elements. Properties of soil determines the nature of the vegetation present. Properties of soil indirectly determines the number and types of animals and people that can be supported. Shoots are plant leaves, flowers, stems, and limbs. Roots are underground and have many functions in which the plant obtains from the soil: physical support. Soil mass anchors the root system so that the plant does not fall over or blow away: air. Roots produce co2 and uses o2 in its ventilation process through soil pores: water. Soil pores absorb rainwater and hold it where it can be used by plant roots. Plants require a continuous stream of water to use in cooling, nutrient transport, turgor maintenance, and photosynthesis. Rainfall varies from place to place, and deep soils may store enough water for plants to survive long periods without rain: temperature moderation.

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